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Reports usages of <code>StringBuffer</code>, <code>StringBuilder</code>, or <code>StringJoiner</code>
which can be replaced with a single <code>String</code> concatenation.
<p>Using <code>String</code> concatenation
  makes the code shorter and simpler.</p>
<p>
This inspection only reports when the suggested replacement does not result in significant
performance drawback on modern JVMs. In many cases, <code>String</code> concatenation may perform better.
</p>
<p><b>Example:</b></p>
<pre><code>
  StringBuilder result = new StringBuilder();
  result.append("i = ");
  result.append(i);
  result.append(";");
  return result.toString();
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  String result = "i = " + i + ";";
  return result;
</code></pre>
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